As part of the Indiebound programme, Nielsen BookScan has generously agreed to supply a weekly independent Top 20 bestsellers report.

1 The World's Worst Children
David Walliams
HarperCollins $24.99
9780008197049
2 Mysterious Mysteries of the Aro Valley
Danyl Mclauchlan
Victoria University Press $30.00
9781776560479
3   Tanya Ashken: Jeweller, Silversmith, Sculptor
Tanya Ashken, Cameron Drawbridge, Lesleigh Salinger, Philip Clarke & Damian Skinner  
Cameron Drawbridge $50.00
9780473349646
4 Soul Secrets
Kelvin Cruickshank
Penguin $19.99
9780143573692
5 In Love with These Times: My Life with Flying Nun Records
Roger Shepherd
HarperCollins $36.99
9781775540892
6 This Must be the Place
Maggie O'Farrell
Hachette $37.99
9780755358830
7 The Last Painting of Sara De Vos
Dominic Smith
Allen & Unwin $36.99
9781743439951
8 The Last Time We Spoke
Fiona Sussman
Allison & Busby $32.99
9780749020262
9 The Sympathizer
Viet Thanh Nguyen
Hachette $27.99
9781472151360
10 Being Mortal: Illness, Medicine and What Matters in the End
Atul Gawande
Profile Books $24.99
9781846685828
11 A Little Life
Hanya Yanagihara
Picador
Pan Macmillan  $24.99
9781447294832
12 The Little Kiwi's Matariki
Nikki Slade Robinson
David Ling  $19.99
9781927305201
13 The Lubetkin Legacy
Marina Lewycka
Fig Tree $37.00
9780241249215
14 The Mandibles: A Family, 2029-2047
Lionel Shriver
HarperCollins $34.99
9780007560752
15 Global Investing: A Guide for New Zealanders
John Ryder
David Bateman  $39.99
9781869539375
16 Coming Rain
Stephen Daisley
Text Publishing $37.00
9781922182029
17 The Blackbird Sings at Dusk
Linda Olsson
Penguin  $38.00
9780143573661
18 Bicycling to the Moon
Timo Parvela
Gecko Press  $19.99
9781776570324
19 The Seven Kites of Matariki
Calico McClintock & Carole Prentice
Scholastic  $19.00
9781775434016
20 The Vegetarian: A Novel
Han Kang
Granta  $22.99
9781846276033